Sanitary nursing-bottle cap



March 4,1930. R. BURTCHAELL 1,749,313

SANITARY ,.NURS ING BOTTLE CAP 7 Filed Jan. 8, 1929 nvmvroa ROYBURTC/IAEL! Patented Mar. 4, 1930 UNITED STATES BOY BUBTGHAELL, OFNEWARK, NEW JERSEY SANITARY NURSING-isomeric car Application filedJanuary 8,1929. Serial No. 331,117.

This invention relates to a sanitary cap for nursing bottles and has forits principal object the provision of a cap which can be placed over thenipple and securely held in position on the neck of the bottle so as toprovide a seal at the junction of the two portions of the cap and thebead around the bottle, whereby dust, dirt, etc., are prevented fromcoming in contact with the projecting portion of the nipple, and sokeeping the a neck 2 and a bead 3 which is closely adj acent the mouthof the bottle. Fitting over the bead 3 and downwardly over the neck 2 ofthe bottle, is an enlarged portion 4 of a nipple 5, having a projectingpart 6.

The protecting shield or cap 7 is prefer ably made of metal, aluminumbeing preferred. The cap 7 has an annular base portion 8, the side wallof which is substantially straight, extending downwardly over the neck 2of the bottle. The lower edge of the portion 8 is upset, forming anannular flange 9 which acts to stiffen the base 8 and to limit theamount which the base ortion 8 may be spread during the action 0 pushingthe cap over the bead 3 of the bottle.

.The upper edge of the base portion 8 is drawn inwardly, forming anannular shoulder 10 and above this point the cap 7 is conical in shape.The base portion 8 is provided with a plurality of indentations 11, fourbeing illustrated in the drawing, which indentations act to press theportion 4 of the nip le 5 against the neck of the bottle below the ead3, thereby lockin the cap 7 in position over the bead 3 and rawing theshoulder 10 against the nipple 5 approximately at the upper edge of thebead 3, thus sealing that portion of the nipple above the shoulder 10within the conical part of the cap 7.

By providing the base portion 8 of the cap with the annular flange 9which is substantially nonspreadable, I have obtained a construction bywhich the cap can be very securely held in position. I have found fromtests that caps made with spring fingers or shtted edges, do not retaintheir hold on the top of bottles even though the bottles are providedwith special necks, and are very easily knocked or pulled off the bottleaccidentally by getting caught on objects around an infants carriage,where m improved form of protecting cap is particu arly adapted for use.

The indentations 11 in the base of the cap are positioned above thestifiening flange 9, so that they can be sprung over the nipple and thebead 3, but the flange 9 being nonexpanding, holds these indentationssecurely under the bead 3 as described.

Having thus described my invention, what I claim is:

1. In combination with a nursing bottle having a bead on the bottle neckadjacent its mouth and a nipple fitting on the neck over said bead; acap for protecting the nipple having; a one-piece part for enclosing theprojecting part of the nipple, and also havan integral annularstiffening flange around the neck of the bottle below said bead, saidbase portion at its junction with said nipple enclosing part restingagainst said bead, forming with the nipple at that point a seal, andmeans on said base portion for securely holiiing the cap in position tomaintain said sea 2. In combination with a nursing bottle having a beadon the bottle neck adjacent its mouth and a nipple fitting on the neckover said bead; a cap for protecting the nipple having; acomically-shaped one-piece part for enclosing the projecting part of thenipple, and an unbroken annular base portion extending from the conicalpart downward over the bead and neck of the bottle and terminating in anintegral annular stiffening flange, said base portion havingindentations mg an annular base portion terminating in therein to snapover said bead to securely draw the junction of the base and conicalparts tightly against the nipple over the bead.

3. A one-piece nursing bottle cap1 for protectinga nipple to be laced ont e bottle, said cap having an un roken annular base portion withsubstantially straight sides, said base having a strengtheninsubstantially non-spreadable flange aroun its outer pc- 10 riphery andan annular shoulder at its inner periphery, and a conical part extendingfrom said annular shoulder, said base havlng indentations to snap over abead on the bottle for the purposes described.

15 4. A one-piece cap, for rotecting a nipple of a nursing bottle w ichhas a bead near its mouth to receive the enlarged portion ofa nipple,having a conical part to fit over the pro ecting part of thenipple, and

go a bottle engaging portion joined to the base of the conical part byan annular shoulder, said bottle engaging part extending downwardthroughout its Whole periphery to encompass the neck of the bottle andterminat 25 ing in an annular substantially non-spreadable flange, andhaving indentations'to be forcibly snap ed over the nipple and head todraw the sl ioulder of the cap against the nipple and the bead. f I fixso testimonyw ereo a my siEature.

ROY BURTC

